Date: Mon, 20 Oct 2014 09:31:06 -0230 (NDT)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <6CE5DBDE1EBF4CAA9A3B3F612F772E13@AGB>
Message-ID: <Pine.LNX.4.64.1410200828510.15924@plato.ucs.mun.ca>
References: <6BF0F1135DB44D52AFFF0448CE54FD98@eplwin764i3>
 <Pine.LNX.4.64.1410191552390.13455@plato.ucs.mun.ca> <6CE5DBDE1EBF4CAA9A3B3F612F772E13@AGB>
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Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks
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Status: O

Hi Markus and Graham,

Thanks for the info on op.  I'll look for a lower QRG in
the passband for 2200m OP32.  Hopefully 478.65 is still OK for OP8.

It is planned to add 630m to the 2200m exciter by replacing the
CMOS 4020 (divide by 16) with a faster 74LS161.  The DDS output is
set at 16f and then divided to improve the resolution and square the 
output, but 16x479 kHz is too fast for the 4020.

Thank-you to IZ7SLZ and SV8RV for their reception reports.

73
Joe VO1NA


On Sun, 19 Oct 2014, Graham wrote:

> Hi Joe ,
>
> Quite possibly ,
>
> One  of the  unintended  consequences  of  NED !
>
> [ Never  Ending Development]
>
> The  last  major  upgrade to Opera  , saw the  removal  of  dual  speeds for 
> each  band  and the  audio being  centred  on 1500  Hz
>
> That  put  the  mid  band  Rf-QRG  at  137.500  with  decoder pass  band +/- 
> say 45 Hz
>
> However ,  decode threshold  and  false  decodes  are  improved ,  with some 
> decodes  showing   with   fade losses of 60%
>
> 477K is now  set  at  OP8    478.500  KHz
>
>
> 73-Graham
>
> --------------------------------------------------
> From: <jcraig@mun.ca>
> Sent: Sunday, October 19, 2014 7:26 PM
> To: <rsgb_lf_group@blacksheep.org>
> Subject: Re: LF: 136 Khz opera 32 deep search last night km07ks
>
>> Thanks Dionysios and Terry GW0EZY for the reports of the OP transmissions.
>> Thanks also to DF6NM for his grabber and accurate freq measurements.
>> It seems many OP stations have migrated down about 50 Hz.  Did I miss
>> something?
>> 
>> The TX was running 240 watts 2.2 amps to the 100 m wire.  Will be QRV
>> & QRO again tonight.
>> 
>> 73
>> Joe VO1NA
>> 
>> On Sun, 19 Oct 2014, Dionysios Vlachiotis wrote:
>> 
>>> sv8rv km07ks Opera-32 correlation
>>>
>>>   date      time   call   distance  frequency bandwidth  snr correlation
>>> 
>>> 2014-10-19 03:54:24 VO1NA   5905km 137554.746Hz   2mHz -47.6dBOp  92% 
>>> 15.1dB
>>> 2014-10-19 01:34:22 VO1NA   5905km 137554.746Hz   2mHz -47.0dBOp  84% 
>>> 16.7dB
>>> 2014-10-18 22:58:33 DF6NM   1510km 137507.749Hz   2mHz -29.9dBOp  97% 
>>> 20.0dB
>>> 2014-10-18 22:50:32 G3XDV   2266km 137529.800Hz   4mHz -39.3dBOp 100% 
>>> 20.3dB
>>> 2014-10-18 20:34:20 G3XDV   2266km 137529.800Hz   2mHz -41.7dBOp  92% 
>>> 19.9dB
>>> 2014-10-18 19:55:44 DF6NM   1510km 137507.749Hz   2mHz -33.0dBOp  88% 
>>> 19.7dB
>>> 2014-10-18 18:24:46 G3XDV   2266km 137529.797Hz   9mHz -46.7dBOp  91% 
>>> 17.7dB
>>> 
>>> 
>>> 
>>> 73 de SV8RV
>>> Dionysios Vlachiotis
>>> Zakynthos (Zante) island GREECE
>> 
>
>